it may feel like a lot but it would be nice to have something new even small for each holiday - it was a nice touch this year to get a pet for christmas and day of the dead. one of these little things each year for each holiday might suffice. plus the mandatory patch update which was missed for some of them for a while (childrens week post wotlk, elders in panda, etc.)

I would love to add the proper current tier gears to be dropped from the holiday bosses, of course I'll like them to add holiday bosses for every holidays and such and possible mount and pet drops as well

Not just pets n' mounts.

I wish we could get a permanent broom mount from Hallow's End.

I wanted to see Children's Week get updated for MoP; pandaren orphans need love too.

Overall, holidays rarely get updates (other than a new achievement or a pet here and there). It would be nice to see some variety in the holiday events. Over the years, I feel like holidays have been simplified and lost their flair/fun.

Here's an example of what I mean:
Before 2010, Love is in the Air used to be more involving than mindlessly grinding Lovely Charms to purchase vendor items. You'd have to give npcs vendor bought Love Tokens in return for gifts that had random holiday goodies inside. I feel like this gave the holiday more flavor and made it resemble Valentine's Day more so than the current holiday set up.

I would like to see some qualities like the above (or new ones) return. I know sometimes it can be tough to keep things interesting without being overly complicated, but we still got through the old Love is in the Air until 2010.

it would be cool to see more holiday bosses, because it's something limited and exciting, though i understand lore contraints with that. alternatively it would be fun to see random stuff in the winter veil presents, kind of like the bags that drop from warbringers and mop rares, but level appropriate.

I'd love a new holiday event of some kind... I've been done with all holiday achieves for years now. Aside from random pets or a quick achievement one shot, I've rarely given them any thought or attention for just that reason. It would be nice to feel excited about a holiday anymore. Even the gear from holiday bosses hasn't been worth the trouble to spam dungeon queues after.